There are more Pokémon that you can catch and add to your collection as you explore Pokémon Brilliant Diamond and Brilliant Pearl. However, some of these Pokémon require you to evolve them through specific methods. For those looking to evolve Yanma into Yanmega, you will need to do a few things for it. In this guide, we will detail how you can evolve Yanma into Yanmega in Pokémon Brilliant Diamond and Brilliant Pearl.
You can only evolve Yanma into Yanmega by making sure your Yanma knows the ancient power of the move. Yanma learns this move when it reaches level 33, so you'll want to catch one before this point and then level up by training it with it or using it in battles. Make sure he removes one of his existing moves to learn the ancient power.
When you learn the move, the next step is to make sure Yanma levels up with the attack. At that point, he will evolve into Yanmega.
If your Yanma has already passed 33 levels, you will need to visit the Move Tutor in Pastoria City. You will also need to make sure you bring Heart Scales. The Move Tutor requires them as payment to teach the moves of Pokémon they have already forgotten.